Magnetic clutch.



PATBNTBD FEB. g5! 1W.

A. W. SAVILLE.

MAGNETIC CLUTCH.

APPLIUATION FILED rms. 2a. 190s gid 'im @5595.'

connection with which my invention is ein! AUNITED STATES' PATENT OFFICE.

i ALFRED W. SAVILLE, OF CHICAGO, ILLINOIS, ASSIGIN'OR TO WESTERN ELEC- TRIO COMPANY, OF CHICAGO, ILLINOIS, A COItIOIiATION OF ILLINOIS.'

MAGNETIC CLUTCH.

' 'speciiication of Letters Patent.

Patented Feb. 26, 1907.

Applikation filed February v24, 1906. Serial No. 302,677.

Toad w'lwm- 116 'ln/ty concern:

Beit known that I, Ani-'nen VW. S.\vii.i.n, n

citizen of the United States, rresiding ut Chicago, in the county of Cool: end Slate of lllinpis, have invented a certain new sind useful Improvement inMagnetic Clutches, of which the following is a full, elear,'concisc, and exact-description.

My invention relates ttii magnetic clutch; and its object is to provide a. double clutch Means forming no pai't oi iny-particuhir inof simple und ellicient construction in which an electric current is used tomegnotize one 1 ,constituting my invention n; coi'npnrntively small number of. eon't'actjrings/ai'c required for carrying current to said coils.'

I will describe/"my invention detail by reference to the accompeyingdrawings, in which* igure 1 is e. vie partlyin longitudinal Section and partly in elevation, -sliowing a driving-shaft hovmg i). magnetic clutch in ployed and two opposing members adopted to e engaged iin( driven by said'clutch.

',Fig. 2 is a. cross-section olone end of the gnnular flanges a.' a, re "iectively. A wall clutch. Fig. VI5 is a diagrammatic view ol' the circuits of my invent-ion` showing the coils so energized as tomagnetize one end of the clutch; and Fig. 4 is a, view showing the coils so energized as to miignetizc the opposite end thereof.

Similar letters of reference refer to similar parts throughout the several views.

The drivin or mein clutch member A in the form of c utcli with which I have chosen to illustrate myinvention is keyeil on a shaft B, so as, to constantl rotate therewith, but i movable longitin inelly on said shaft.

aid main clutch member is symmetrical and has two cores afa', adapted to receive coils C (Tin a chambeibetween said cores and the with brnshcsff f2, respectively, und serve yoke-piece for the magnets.

The driven members l) D', of iron, are loosely mounted on tll'e shaft B and are pro vided with eers d d res ectivcl f'. '1`lie members l) IJ ere, in e'll'ect, armaturesone for each end of the main clutch 'member A.

vention nre provided for preventing the lona, separiiting seidclieinbers, constitutes u gitudinul movement ol' seid drivenfnicliibeis. 1,'

'Ihree contact-rings ifa ef, insulated from each otherend from the member A,enguge to carry current into the coils. i.

As is well known, if eithcroftlic iron menibcrs l) D is in contact with the clutch inember A ,the clutch will not readily disengnge when the current is interriipted,`es tIie-residuiil magnetism is sullieient tohold the iron members together with considerable force. To canse immediate diseni'affemcnt of one face and the engagement ol the other when the switchis reversed, 1 have provided e novel arrangement of circuits for the two coils of the double-ended clutch.

Referring to Figs. 3 and 4, u conductor 1,r

lending from the middle ring e', has two binne-lies 2 :ind 2, which extend through coils C and C to rings e und e, respectively. A pnrellel brunch 3, connecting the branches 2 end 2, extends from e point 5 in the coil C to :i corresponding point 6 in the coil C. The

which :ire eonductively connected to thecontect-terniiinilsy t t, respectively. The ring e' is engaged by brush j", eonductively united to one or more contzictterminals t. A

rings c :ind e! :ire engaged by brnshesfendf,

double-pole switch S serves to connect said contacts with the terminals of a'battery vor other sourceid' current. i

If when the members Afand D are in en gegement it is desired to release the same and ceiise theei'igngement of the members A and D, switch S is moved from'the position shown in Fig. 4 into the position shown in Fig. 3. Current then News, as indicated by the errows, from the plus terminal to contact t', ring e', conductor l, Conductor 2, including coil C, to ring e, :ind from thence to the contiret t, connected to the minus terminal, thereby ningnetizing the end of the clutch A ad jacent to the member D. As is shown in Fig. 3, e branch circuit extends fompoint 4 IOO branch includes a portion of the coil C. The direction of the current through eoilC is suchgs to quickly render non-magnetic the end o lthe clutch member i A adjacent to the member D. In similar marnner by moving the switch from the pcsiy to point 5, which tion shown in Fig. 3 into the Eosition shown in Fig. 4 theA end of the mem er A adjacent to member D is manetized und the Vopposite end demagnetize "Having thus described my invention, I claim- 1. The combination with a double-ended magnetic clutch provided with a 1n egnetizing- Y which one end of each coil is connecte( Vends of the coils,

coil for each end thereof, of n contoct-ring'to I which one end vof each coil is connected, nflditional contact-rings, one for eoch of the other l a conducto uniting intermediate points in the two coils, and n source l of current adapted to have its terminals connected to the common ring'and to one of the remeilning rings.

n a. magnetic clutch, the combination with a. double-end clutch member, of a. coil for each end thereof, of a. contact-rin e to j conconnected respectively to the l' tactrings e e,

of the coils, a branch Acircuit 1 opposite ends unitingr a point in one coil to e corresponding point 1n another coil, and a switch or connecting the ring c' to one terminal of e source of current and one cf the remaining rings to the opposite terminal.

3. In a magnetic clutch, the combination with e double-enderl clutch-body rovcled with an energizing-coil for each en of two contact-rings connected respectively with one end of euch of the energizing-coils, and n. third contact-ring to which the other ends of said coils are connected, and a conductor uniting intermediate points in the two coils and thereby dividing euch coil into two parts.

4. In n magnetic clutch, the combination with n doul le-cndcd clutchbody provided with un energizing-coil fer each end, of e conductor uniting the end of one coil with an end of the ether coil, and o conductcr uniting intermediate points in the two coils; whereby u current which mngnetlzes one end of the.

clutch dennignetizes the other end thereof.

In witness whereof I hereunto subscribe my name this 12th (luy of February, A. D. 1906.

ALFRED W. SAVILLE. \`l"itncsscs:

BERTEN S'rARnYonK, ROY T. ALLowAY. 

